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Valve hole ream-extrude working method

A processing method and reaming technology, applied in metal processing equipment, reamers, manufacturing tools, etc., can solve the problems of poor rigidity of reamers, non-interchangeability, uneven force on teeth, shorten production cycle, and ensure consistency performance, high production efficiency

Inactive Publication Date: 2006-05-24
贵州凯星液力传动机械有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the processing of high-precision deep valve holes (length-to-diameter ratio 9:1) generally adopts the method of reaming-semi-fine boring-reaming-grinding, and high-speed steel and hard alloy ordinary reamers and extended-edged reamers are used for reaming. For knives and helical tooth reamers, the surface roughness is Ra1.6-Ra3.2, the shape accuracy is 9-10, of which the cylindricity is 10; the grinding production efficiency is low, and the labor intensity is high if it is manually ground, and the valve Not interchangeable with those with small hole clearance
[0003] The main causes of poor cylindricity are poor rigidity of the reamer, uneven force on the teeth during reaming, poor shape accuracy of the pre-machined hole, misalignment of the axis of the pre-machined hole and the axis of the reaming machine tool, and the influence of the casting oil passage, etc.

Method used

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  • Valve hole ream-extrude working method

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Embodiment Construction

[0020] Embodiments of the invention: in combination figure 1 processing parts, figure 2 , image 3 tool description.

[0021] The processed deep valve hole such as figure 1 As shown, after processing, the accuracy is: diameter change: 0.005, surface roughness Ra0.8, straightness: the hole can pass through the inspection rod with a diameter direction and hole gap of 0.005-0.01, roundness: roundness Instrument inspection, less than 0.005. Its implementation method is as follows:

[0022] Selection method process: reaming - semi-finish boring - reaming;

[0023] Select cutting speed Vc=4~7m / min, feed rate f=0.07~0.15mm / r, cutting depth ap=0.08~0.3mm, extrusion amount 0.007~0.03mm.

[0024] First, carry out reaming, using a reaming knife ( figure 2 ), the reaming cutter includes a cutter body (1), a clamping screw (2) and a blade (3); when in use, both ends are supported, which increases the rigidity of the cutter body and increases the stability of the cutter during cutt...

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PUM

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Abstract

The present invention discloses a method for machining valve hole by simultaneously adopting reaming and extruding processes. Said method process includes broaching-semifinishing boring-reaming and extruding hole; selecting cutting parameters (cutting speed Vc=5.9m / min, feeding rate f=0.084mm / r and cutting depth ap=0.1mm) and extrusion quantity (0.01-0.02mm). the broaching process adopts broaching cutter, semi-finishing boring process adopts boring cutter with two edges and reaming-extruding process adopts reaming-extruding cutter.

Description

technical field [0001] The invention relates to a method for simultaneously reaming and extruding a valve hole, in particular to a method for simultaneously reaming and extruding a high-precision deep valve hole. Background technique [0002] At present, the processing of high-precision deep valve holes (length-to-diameter ratio 9:1) generally adopts the method of reaming-semi-fine boring-reaming-grinding, and high-speed steel and hard alloy ordinary reamers and extended-edged reamers are used for reaming. For knives and helical tooth reamers, the surface roughness is Ra1.6-Ra3.2, the shape accuracy is 9-10, of which the cylindricity is 10; the grinding production efficiency is low, and the labor intensity is high if it is manually ground, and the valve Not interchangeable with those with small hole clearance. [0003] The main causes of poor cylindricity are poor rigidity of the reamer, uneven force on the teeth during reaming, poor shape accuracy of the pre-machined hole,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00B23B27/00B23D77/00
Inventor 叶义书陈俊锋
Owner 贵州凯星液力传动机械有限公司
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